US2006279196A1PendingUtilityA1

White LED

34
Assignee: HSU WEI-JENPriority: Jun 2, 2005Filed: Jun 2, 2005Published: Dec 14, 2006
Est. expiryJun 2, 2025(expired)· nominal 20-yr term from priority
Inventors:Wei-Jen Hsu
H10W 90/756H10W 74/00H10W 72/07554H10W 72/01515H10W 72/884H10W 72/547H10W 72/075C09K 11/77922C09K 11/77342H10H 20/8512H05B 33/14C09K 11/7796C09K 11/7786
34
PatentIndex Score
0
Cited by
0
References
0
Claims

Abstract

A white LED comprising at least an excitation light source and a fluorescent powder, the excitation light source issues light with wavelength between 285 nm to 490 nm, the fluorescent powder is installed around the excitation light source to receive the light from the excitation light source; the materials of the fluorescent powders is one of the (Ca,Sr,Ba,) 8 Mg(SiO 4 ) 4 Cl 2 :Eu 2+ , Dy 3+ , Mn 3+ for better luminant efficiency and better excitation effect.

Claims

exact text as granted — not AI-modified
1 . A white LED comprising: 
 an excitation light source issues light beam with wavelength between 250 nm to 490 nm; and    a fluorescent powder placed around said light source to receive said light beam issued, said fluorescent powder is mixed with one or more of (Me 1-x-y Eu x Re y ) 8 Mg z (SiO 4 ) m ,Cl n , (Me 1-x Eu x )ReS and (Ca 1-x-y ,Sr x ,Ba y ) 5 (PO 4 ) 3 Cl:Eu 2+ ,Gd 2+.      
   
   
       2 . The white LED recited in  claim 1 , wherein said light beam has wavelength between 440 nm to 490 nm, said fluorescent powder is mixed with one or more of (Me 1-x-y Eu x Re y ) 8 Mg z (SiO 4 ) m ,Cl n :  (Me 1-x Eu x )ReS.  
   
   
       3 . The white LED recited in  claim 1 , wherein said light beam has wavelength between 250 nm to 440 nm, said fluorescent powder is mixed with one or more of (Me 1-x-y Eu x Re y ) 8 Mg z (SiO 4 ) m ,Cl n :, (Me 1-x Eu x )Re Sand (Ca 1-x-y ,Sr x ,Ba y ) 5 (PO 4 ) 3 Cl:Eu 2+ , Gd 2+.    
   
   
       4 . The white LED recited in  claim 1 , wherein 0<x≦0.8, and 0≦y≦2.0, 0≦Z≦1.0, 1.0≦m≦6.0, 0.1≦n≦3.0.  
   
   
       5 . The white LED recited in  claim 1 , wherein said Me is one or more member of Calcium, strontium, barium groups.  
   
   
       6 . The white LED recited in  claim 1 , wherein the Re is one or two of Praseodymium, Rubidium, Samarium, Dysprosium, Holmium, Yttrium, Erbium, Europium, Thulium, Ytterbium, Lutetium, Gadolinium, Magnesium or Manganese, said fluorescent powders contains Ca, Sr, Ba, Mg, Cl, SiO 4 , Dy, the original powders contain metal chemical combination oxidation, nitrate, organic metal combination or their metal salts (Na2SO4, CaSO4, BaSO4).  
   
   
       7 . The white LED recited in  claim 1 , wherein said red fluorescent powder applies Na 2 S process, with addition of Sm for better luminant efficiency and heat-resistance, said red fluorescent powders contains Ca, Sr, Ba, S, Cl, Eu, Sm, the original powders contain metal chemical combination oxidation, nitrate, organic metal combination or their metal salts (Na2SO4, CaSO4, BaSO4).  
   
   
       8 . The white LED recited in  claim 1 , wherein aid blue fluorescent powder (Ca 1-x-y ,Sr x ,Ba y ) 5 (PO 4 ) 3 Cl:Eu 2+  with addition of Gd in production for better luminant efficiency, said blue fluorescent powders (Ca 1-x-y ,Sr x ,Ba y ) 5 (PO 4 ) 3 Cl:Eu 2+ Gd 2+  contains Ca, Sr, Ba, PO 4 , Cl, Eu, Gd chemical elements, the original powders contain metal chemical combination oxidation, nitrate, organic metal combination or their metal salts (Na2SO4, CaSO4, BaSO4).  
   
   
       9 . The white LED recited in  claim 1 , wherein said excitation light source includes either one of LED die or LASER LED die.  
   
   
       10 . A white LED comprising: 
 a carrier with a protruding part on a plane or a protruding part on a concave to lift luminant efficiency for better brighter efficiency;    an excitation light source installed on top of said protruding part on a plane or said protruding part on a concave of said carrier, said excitation light source issues light beam with wavelength between 250 nm to 490 nm;    a packaging installed on top of said carrier to cover said excitation light source and fix said excitation light source firmly on said carrier; and    a fluorescent powder installed inside said packaging to receive light beam issued by said excitation light source, said fluorescent powder one or more of (Me 1-x-y Eu x Re y ) 8 Mg z (SiO 4 ) m ,Cl n :,(Me 1-x Eu x )ReS, Gd 2+  and (Ca 1-x-y ,Sr x ,Ba y ) 5 (PO 4 ) 3 Cl:Eu 2+ .    
   
   
       11 . The white LED recited in  claim 10 , wherein several wires connect said excitation light source and said carrier electrically.  
   
   
       12 . The white LED recited in  claim 10 , wherein said carrier includes either one of lead frame or circuit board.  
   
   
       13 . The white LED recited in  claim 10 , wherein said excitation light source includes either one of LED die or LASER LED die.  
   
   
       14 . The white LED recited in  claim 10 , wherein the light beam has wavelength between 440 nm to 490 nm, then said fluorescent powder contains one or more of (Me 1-x-y Eu x Re y ) 8 Mg z (SiO 4 ) m ,Cl n :, and (Me 1-x Eu x )ReS.  
   
   
       15 . The white LED recited in  claim 10 , wherein the light beam has wavelength between 250 nm to 440 nm, then said fluorescent powder contains one or more of (Me 1-x-y Eu x Re y ) 8 Mg z (SiO 4 ) m ,Cl n :, (Me 1-x Eu x )ReS, Gd 2+ , and Ca 1-x-y ,Sr x ,Ba y ) 5 (PO 4 ) 3 Cl:Eu 2+ .  
   
   
       16 . The white LED recited in  claim 10 , wherein 0<x≦0.8, and 0≦y≦2.0, 0≦Z≦1.0, 1.0≦m≦6.0, 0.1≦n≦3.0, the original powders contain metal chemical combination oxidation, nitrate, organic metal combination or their metal salts (Na2SO4, CaSO4, BaSO4).  
   
   
       17 . The white LED recited in  claim 10 , wherein Me contains more than one more member of Calcium, Strontium and Barium groups.  
   
   
       18 . The white LED recited in  claim 10 , wherein Re contains more than one member of Praseodymium, Rubidium, Samarium, Dysprosium, Holmium, Yttrium, Erbium, Europium, Thulium, Ytterbium, Lutetium, Gadolinium, Magnesium and Manganese groups.  
   
   
       19 . A white LED die and green LED die comprising: 
 a white LED die issuing a light beam with wavelength between 250 nm to 490 nm, said LED dies and a fluorescent powder further comprise:    a circuit board;    an LED die;    an electrical conductive buffer layer located between said circuit board and said LED die;    a positive electrode connecting to and above said electrical conductive buffer layer;    a negative electrode connecting to said electrical conductive buffer layer is isolated to the first and second bond courses, luminant layer, contacting layer and said positive and negative electrodes; and    a fluorescent powder layer surrounding said LED dies to receive light beam by the excitation light sources, said fluorescent powders contains more than one of (Me 1-x-y Eu x Re y ) 8 Mg z (SiO 4 ) m ,Cl n :, (Me 1-x Eu x )ReS, and (Ca 1-x-y ,Sr x ,Ba y ) 5 (PO 4 ) 3 Cl:Eu 2+ , Gd 2+ .    
   
   
       20 . The white LED die and green LED die recited in  claim 19 , wherein said white LED die's wavelength between 440 nm to 490 m, said fluorescent powder contains more than one of (Me 1-x-y Eu x Re y ) 8 Mg z (SiO 4 ) m ,Cl n : and (Me 1-x Eu x )ReS.  
   
   
       21 . The white LED die and green LED die recited in  claim 19 , wherein said green LED die's wavelength between 250 nm to 440 nm, said fluorescent powder contains more than one of (Me 1-x-y Eu x Re y ) 8 Mg z (SiO 4 ) m ,Cl n :, (Me 1-x Eu x )ReS, (Ca 1-x-y ,Sr x ,Ba y ) 5 (PO 4 ) 3 Cl:Eu 2+  and Gd 2+ .  
   
   
       22 . The white LED die and green LED die recited in  claim 19 , wherein 0<x≦0.8, and 0≦y≦2.0, 0≦Z≦1.0, 1.0≦m≦6.0, 0.1≦n≦3.0.  
   
   
       23 . The white LED die and green LED die recited in  claim 19 , wherein Me contains more than one more member of Calcium, Strontium and Barium groups.  
   
   
       24 . The white LED die and green LED die recited in  claim 19 , wherein Re contains more than one member of Praseodymium, Rubidium, Samarium, Dysprosium, Holmium, Yttrium, Erbium, Europium, Thulium, Ytterbium, Lutetium, Gadolinium, Magnesium and Manganese groups.  
   
   
       25 . The white LED die and green LED die recited in  claim 19 , wherein a plane or a protruding part on a concave on said circuit board to carry said LED dies.  
   
   
       26 . The white LED die and green LED die recited in  claim 19 , wherein the thickness of said fluorescent powder layer is between 0.5 mm to 3.0 mm.  
   
   
       27 . The white LED die and green LED die recited in  claim 19 , wherein the material of said circuit board contains at least Sapphire, SiC, ZnO, Si, GaP and GaAs.

Cited by (0)

No later patents cite this yet.

References (0)

No backward citations on record.